Our little 12K5 tube crystal controlled oscillator was designed for 40 meter code CW operation. It was first published in CQ magazine in 2006. The output from this "space charge" tube running 12 volts on the plate is a small fraction of a watt. It might be useful for code practice to your receiver across the shack from your oscillator. . This little kit with its complete instruction manual will provide you with simple assembly, wiring, testing and soldering and construction practice. Kit includes NOS tested 12K5 tube. Supplied with kit is 40 meter crystal, mini tuning capacitor, tube socket, clips, and a coil form with winding instructions, and a spare coil form for experimentation. You supply a 12 VDC at 1 amp min power supply, key and dummy load

All information, images, and documents on this website are the sole property of Pastime Projects of Mount Victory Ohio USA. Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from Pastime Projects.